Burris Browning A-Bolt Trumount Scope Base

From Als.com

The Burris Trumount Base was made to meet the demands of extreme shooters. Burris knows that the true building blocks of an accurate shooting system are the rings and bases. To consistently put your rounds on target time and time again, your scope needs to be properly aligned and anchored to your gun. That's why every ring and base they offer is computer designed and engineered to specifications that would make NASA proud. They guarantee precise optical alignment and shot placement. They will withstand years of use and punishing recoil and look good with any scope on any gun.